We have Invicta Men's 4950 Reserve Speedway Skeleton Mechanical Automatic Watch with Product Detail Quality Swiss-automatic movement; functions without a battery; powers automatically with the movement of your arm Scratch-resistant-sapphire crystal Case diameter: 46 mm 18k-ion-gold-plated-stainless-steel case; gray-skeleton dial Water-resistant to 660 feet (200 M) . The "Invicta Men's 4950 Reserve Speedway Skeleton Mechanical Automatic Watch" is best product for you. We recommended Invicta Men's 4950 Reserve Speedway Skeleton Mechanical Automatic Watch